1. From the Department of Cardiology & Electrophysiology (B.K., H.Y., C.H.T., A.D., A.Y., E.G., C.H., R.G.T., M.H.), and Department of Radiology, Witten/Herdecke University, Krankenhaus Porz am Rhein, Cologne, Germany (P.M.B.); and Klinikum Lüdenscheid Clinic of Internal Medicine, Lüdenscheid, Germany (O.H.).